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ICCC 2008 - IEEE 6th International Conference on Computational Cybernetics

作者： Radac, M.-B. Precup, R.-E. Preitl, S. Tar, J.K. Fodor, J. Petriu, E.M. Dept. of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech. Polytechnical Institution Budapest Hungary School of Information Technology and Engineering University of Ottawa Ottawa Canada

ISBN: (纸本)9781424428755

The paper suggests PI controllers for longitudinal slip control in the framework of a laboratory Anti-lock Braking System (ABS). The new design methods make use of gain-scheduling and Iterative Feedback Tuning. They prove to be relatively simple and transparent thus ensuring low-cost automation solutions. The digital implementation of the controllers is done for the laboratory ABS. Real-time experimental results validate the theoretical approaches. © 2008 IEEE.

关键词： Controllers

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Pole placement approaches for linear and fuzzy systems

Pole placement approaches for linear and fuzzy systems

引用

6th International Symposium on Intelligent Systems and informatics, SISY 2008

作者： Preitl, S. Precup, R.-E. Clep, P.A. Ursache, I.-B. Fodor, J. Škrjanc, I. Dept. of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech. Polytechnical Institution Budapest Hungary Laboratory of Modelling Simulation and Control University of Ljubljana Ljubljana Slovenia

The paper investigates several pole placement methods in the linear case and suggests a new pole placement method by means of fuzzy linear equations. The linear methods concern the constant real part poles, the poles places on a circle, Butterworth configurations without and with the correction of the imaginary part, the pole-zero cancellation, and the poles placed on an ellipse. Low order systems are considered. The pole placement methods are compared by the digital simulation of control systems' behaviors with respect to the modification of the reference input. The conclusions are useful for continuous control systems, and they can be extended easily to digital control systems including quasi-continuous ones. ©2008 IEEE.

关键词： Poles

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On the stable design of stable fuzzy control systems with iterative learning control

On the stable design of stable fuzzy control systems with it...

引用

9th International Symposium of Hungarian Researchers on Computational Intelligence and informatics, CINTI 2008

作者： Preitl, Stefan Precup, Radu-Emil Radac, Mircea-Bogdan Dragoş, Claudia-Adina Tar, József K. Fodor, János Department of Automation and Applied Informatics Politehnica University of Timisoara Bd. v. Parvan 2 RO-300223 Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Bécsi úT 96/B H-1034 Budapest Hungary

The paper proposes the stable design of a new generation of fuzzy control systems using Mamdani PI-fuzzy controllers (PI-FCs) in four control system structures based on the combination beetween feedback control structures and Iterative Learning Control (ILC) algorithms. The design is backed up by a stability analysis method expressed in terms of the specific matrix approach with nonlinearity vectors defined in the matrix space. Part of the theoretical results is validated in controlling servo systems considered as second-order integral type benchmarks.

关键词： Iterative methods

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Low-cost fuzzy logic approach to ship course control

Low-cost fuzzy logic approach to ship course control

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International Symposium on Electronics in Marine (ELMAR)

作者： Radu-Emil Precup Stefan Preitl Jozsef K. Tar Janos Fodor Ion-Bogdan Ursache Petru Alexandru Clep Department of Automation and Applied Informatics Polytechnic University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary

ISBN: (纸本)9781424433643

The paper suggests a new fuzzy logic approach to ship course control based on Takagi-Sugeno PID-fuzzy controllers designed in terms of Iterative Feedback Tuning. The fuzzy controllers belong to the class of low-cost automation solutions due to the simplicity and transparency of the design method and the easy controller implementation. One case study focused on servo system control validates the theoretical approach by real-time experimental results.

关键词： Fuzzy logic Marine vehicles Automatic control Takagi-Sugeno model Iterative methods Feedback Fuzzy control Design automation Design methodology Servomechanisms

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Improved performance models and algorithms

Improved performance models and algorithms

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ICCC 2008 - IEEE 6th International Conference on Computational Cybernetics

作者： Bogárdi-Mészöly, Ágnes Levendovszky, Tihamér Rövid, András Budapest University of Technology and Economics Department of Automation and Applied Informatics Goldmann Gy. ter 3. IV. em Budapest H-1111 Hungary Budapest Tech Polytechnical Institution Institute of Intelligent Engineering Systems Bécsi út 96/B Budapest H-1034 Hungary

ISBN: (纸本)9781424428755

Web-based software systems access some resources while executing the requests of the clients, typically several requests arrive at the same time, thus, competitive situation is established for the resources. In case of modeling such situation queueing model-based approaches are widely recognized. In our work, novel models and algorithms have been proposed to model the queue limit performance factor. In addition, the computational complexity and the limit analysis of the proposed models and algorithms have been provided. Moreover, the practical application of the results has been shown. © 2008 IEEE.

关键词： Queueing theory

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Data Model Driven Enterprise Service Bus Interceptors

Data Model Driven Enterprise Service Bus Interceptors

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Euromicro Conference on Software Engineering and Advanced Applications (SEAA)

作者： Michael Thonhauser Christian Kreiner Egon Teiniker Gernot Schmoelzer Institute for Technical Informatics Graz University of Technology Graz Austria FH JOANNEUM University of Applied Science Kapfenberg Austria Salomon Automation GmbH Friesach Austria

Integration of distributed software systems is an important issue in enterprise computing. Assembling of loosely coupled services via XML based protocols is a frequently used technique today. To overcome the struggle between safety of a strong typed interface and flexibility of generic parameters, we present a novel approach that uses model-typed interface parameters together with the idea of model compatibility verification. It respects separated ownerships of service provider and consumer interfaces, and adds a mediating connector based on platform-independent, model-based functional interface reconciliation. Given a pair of compatible interfaces an interface connector that integrates related services can be realized automatically. The concept of rule-based compatibility verification can also increase the efficiency of service repository lookups significantly.

关键词： Data models Service oriented architecture XML Software engineering Software systems Protocols Connectors Programming Application software informatics

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New dual channel quasi resonant DC-DC converter topologies for distributed energy utilization

New dual channel quasi resonant DC-DC converter topologies f...

引用

International (EPE-PEMC) Power Electronics and Motion Control Conference

作者： J. Hamar I. Nagy P. Stumpf H. Ohsaki E. Masada Department of Automation and Applied Informatics Budapest University of Technology & Economics Budapest Hungary University of Tokyo Tokyo Japan Railway Technology Research Institute Tokyo Japan

The paper is concerned with new resonant converter configurations, belonging to the previously published dual channel dc-dc converter family. On one hand, the new configurations solve a significant shortcoming of the original ones, namely, the output midpoint potential was floating in comparison with the input midpoint. This caused a high-frequency oscillation of the output midpoint, often significantly limiting the application fields. Common ground can be used at the input and output sides at the new configurations. In addition, two of the new topologies also include electrical isolation, performed by an isolating high-frequency transformer. This property is often necessary in order to fulfill the strict industrial requirements against the power converters.

关键词： Converters Capacitors Inductors Control systems Topology Switches Motion control

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Project management stage mutations within agile methodological framework process transformations

引用

WSEAS Transactions on Information Science and Applications 2008年第5期5卷 776-785页

作者： Markopoulos, Evangelos Bilbao, Javier Bravo, Eugenio Stoilov, Todor Vos, Tanjia E.J. Talamanca, Carlo Figa Reschwamm, Katrin Department of Informatics University of Piraeus 80 Karaoli and Dimitriou Str. Piraeus Greece Applied Mathematics Dept. University of the Basque Country Alda. Urkijo s/n. Bilbao Spain Dept. Hierarchical Systems Institute of Computer and Communication Systems Bulgarian Academy of Sciences Acad. Bonchev str. Sofia Bulgaria Information Technology Institute University of Valencia Camino de Vera s/n Valencia Spain Technology Division - ICT Area Via Giacomo Peroni 386 Roma Italy The Fraunhofer Institute for Factory Operation and Automation Fraunhofer IFF ICCL Sandtorstrasse 22 Magdeburg Germany

Projects are living entities. They are born with the project idea and end with the project termination. The time in between can last for many years, in most of the cases, requiring continuous implementation and management effort. Over the time project changes on requirements change the implementation process and in turn the management process, the maintenance process and so on. In order to maintain qualitative and quantitative project results both the project implementation and management processes need to be adjusted in the overall project changes and environment. This adjustment can be made by using agile project management methodologies, defining processes based on the identification of the project goals, constraints and expatiations. Unfortunately that is not enough, and projects, especially software projects are still in implementation and management crisis. This paper presents the concept of process mutation on project management methodological frameworks as a supplementary method to the agile models and agility the concept.

关键词： Project Management Agility Process Mutation Process Framework

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“Active flux” orientation vector sensorless control of IPMSM

“Active flux” orientation vector sensorless control of IPM...

引用

International Conference on Optimization of Electrical and Electronic Equipment, OPTIM

作者： Ion Boldea Mihaela Codruta Paicu Gheorghe Daniel Andreescu Frede Blaabjerg Department of Electrical Engineering University of Politehnica Timisoara Timisoara Romania Department of Automation and Applied Informatics University of Politehnica Timisoara Timisoara Romania Institute of Energy Technology University of Aalborg Aalborg Denmark

This paper presents a novel strategy for the vector control of IPMSM, without signal injection. The overall performance of the motion-sensorless control depends strongly on the accuracy of the rotor position and speed estimation. The proposed state observer is based on the concept of the ldquoactive fluxrdquo (or ldquotorque producing fluxrdquo), which ldquoturns all the salient-pole rotor ac machines into nonsalient-pole onesrdquo. As well as giving a detailed explanation of the concept, the paper demonstrates, through a wide range of experimental results, the effectiveness of the active flux observer under half full rated torque operating conditions in 2 rpm-1000 rpm speed range.

关键词： Rotors Stators Observers Torque Estimation Inverters Resistance

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Improved Performance Models and Algorithms

Improved Performance Models and Algorithms

引用

International Conference on Computational Cybernetics (ICCC)

作者： Agnes Bogardi-Meszoly Tihamer Levendovszky Andras Rovid Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Institute of Intelligent Engineering Systems Budapest Technology Polytechnical Institution Budapest Hungary

关键词： Algorithm design and analysis Yarn Software systems Computational complexity Application software Algebra Stochastic processes Queueing analysis Economic forecasting automation

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